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EP0166981A1 - Position control device for sideguides or guide rollers that are arranged shiftable at right angles to the direction of rolling before hot strip finishing rolling mills - Google Patents

Position control device for sideguides or guide rollers that are arranged shiftable at right angles to the direction of rolling before hot strip finishing rolling mills Download PDF

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Publication number
EP0166981A1
EP0166981A1 EP85106802A EP85106802A EP0166981A1 EP 0166981 A1 EP0166981 A1 EP 0166981A1 EP 85106802 A EP85106802 A EP 85106802A EP 85106802 A EP85106802 A EP 85106802A EP 0166981 A1 EP0166981 A1 EP 0166981A1
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EP
European Patent Office
Prior art keywords
strip
guide
guide rollers
piston
rolling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85106802A
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German (de)
French (fr)
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EP0166981B1 (en
Inventor
Jürgen Dr. Ing. Klöckner
Dieter Rosenthal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT85106802T priority Critical patent/ATE35387T1/en
Publication of EP0166981A1 publication Critical patent/EP0166981A1/en
Application granted granted Critical
Publication of EP0166981B1 publication Critical patent/EP0166981B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work

Definitions

  • the invention relates to a positioning control device arranged in front of the entrance of hot strip finishing rolling mills, consisting of guide rulers or guide rollers that can be displaced transversely to the rolling direction and driven by piston-cylinder units, strip side guides that are dependent on continuously transmitted measured values of the strip positions within the finishing rolling mill for each position control circuit assigned to the piston-cylinder units, after comparison of the actual measured values with predetermined target values, generates control signals which cause a corresponding displacement of one or both guide strips or guide rollers.
  • Positioning control devices of this type are based on the knowledge gained from practical tests that the strip position in the finishing mill is identical to the shape and position of the pre-strip, i.e. straight strips have a correspondingly straight and good strip run when the finishing roller is set correctly, in which the side guides only the strip hold, and opening the belt edges on the side guides leads to the belt run.
  • the decisive influence on the run of the strip through the finishing mill is a strip side guide, which is arranged in front of the first stand of the finishing mill; with it, the position of the tape and thus the course of the tape in the following Finishing mill can be influenced in a targeted manner.
  • a positioning control of this type (DE-OS 3 116 278)
  • the side edges of the hot wide strip are acted upon by guide rollers which can be moved transversely to the rolling direction in displacement guides before entering the first stand of the finishing mill.
  • the displacement movements are effected by servomotors that are part of positioning control loops. With the help of these servomotors, it is possible to counteract an expected skewing of the strip before this course becomes visible, since the comparative evaluation of the measurement results transmitted by the measuring devices arranged within the finishing mill announces a tendency of the strip to skew so in good time that the corresponding change in position can be counteracted by moving the guide rollers.
  • the known device makes use in particular of elastically deformable bending beams which, in the case of a slight elastic deformation by means of strain gauges, already trigger signals when the side pressure of the edges of the rolled strip exceeds predetermined values.
  • This positioning control has proven itself for the lateral guidance of essentially normal pre-strips. Difficulties arise when, for example, the end of a supporting strip is wider than its nominal width. In this case, the end of the belt is forcibly pulled from the first finishing stand through the side guide and may stress these guides with a multiple of the normal load. This can result in a large one-sided deformation of the strip edges and even buckling of the strip and also in large axial reaction forces in the bearings of the rolls of the first roll scaffolding of the finishing train; this stress occurs especially when the band end is curved on one side. In this case, the end of the belt is supported on one side on one of the side guides and presses against it with relatively great force.
  • the reaction forces have to be absorbed by the axial bearings of the rollers of the first rolling stands of the finishing train and can damage the bearings.
  • the known position control devices do not respond to such a condition, or do so incorrectly, since the position of the strip displayed for the measuring devices within the finishing mill is correct and the measuring devices for the side pressure, if any, only indicate that the specified target value has been exceeded and the generation of correction signals for the Have the belt restore straight running.
  • the invention has for its object to improve the generic positioning control devices so that the harmful effects of wide tapes or bent tape ends on the side guides, the tape and the bearings are avoided by the operation of the positioning control device.
  • This object is achieved in that the position control is superimposed by a pressure control which, depending on the comparison of the actual value of the compressive force occurring and measured by the strip edge when a guide strip or guide roller is acted upon, with a predetermined desired value, a correction actuating signal for the Displacement of both guide strips or guide rollers in the opening or closing sense generated.
  • the correction actuating signal generated thereby causes the two guide strips or guide rollers to be displaced away from each other in the opening direction until the compressive force drops again to the permissible predetermined value is.
  • the damaging high bearing load as a result of curved belt ends is avoided in that an additional correction control signal for the position control of the guide strips or guide rollers is possibly supplied by a monitoring controller. This is the case when the differential compressive force between the drive and operator side, which is measured continuously, exceeds a predetermined differential setpoint. Then this causes a corresponding displacement movement of the guide bar or guide roller which is subject to higher loads in the opening direction, i.e. away from the assigned band edge.
  • the width of the sliver can be corrected to a limited extent by means of a targeted movement of the side guides in the opening and closing directions with a corresponding control concept, without the strip edges being deformed or the strip buckling.
  • the circuit diagram of the positioning control shown in FIG. 2 shows the arrangement and connection of the circuit elements.
  • a low-pressure (LP) system is used to travel long distances.
  • the piston-cylinder units 5 on the drive and operating side are connected to the LP pumps via switching valves 10.
  • the possible travel speed results from the pump capacity and the cylinder dimensions.
  • the respective gauge roll gap can be roughly approached using the ND system.
  • the exact positioning is then carried out via the position control of the piston-cylinder units 5. If the HD system fails, the already explained balancing cylinders 7, 8 (FIG. 1) automatically pull the piston 4 of the piston-cylinder unit 5 back , so that rolling can continue even in the event of such a failure.
  • the piston or piston rod side of the piston-cylinder unit 5 are acted upon by the system pressure or connected to the tank 12 via a servo valve 11 in accordance with the respective direction of movement.
  • the accumulators arranged in the immediate vicinity of the servo valves 11 are dimensioned in such a way that small adjustment paths can be driven out of the accumulators without major pressure loss. The capacity of the - not shown - HD pump is therefore small.
  • the loop gain of the position control loop with a position transmitter 13 on the drive and the operator side is composed of an electrical and a hydraulic component. If a target / actual deviation is determined, then the servo valve 11 is opened by a certain amount in accordance with the electrical amplification via position and current controllers. The then moving speed is not only proportional to the valve opening, but also depends on the pressure drop at the control edge of the servo valve 11. This pressure drop is determined by the compression force and the system pressure. The loop gain of the position control loop is therefore dependent on the force.
  • Two pressure transmitters 14, 15 measure the compression force on the drive and operator side. If, for example, the measured force exceeds the predetermined target value 16, the pressure controller 17 supplies a correction signal ⁇ s 1 for the position control loop. This causes the guide strips or guide rollers to move away from each other in the opening direction until the compressive force has dropped again to the permissible predetermined value.
  • the differential compressive force between the drive and operating side is continuously determined on the summer 18. If this force exceeds the predetermined target value 19, supplies the monitoring controller 20 correction signals ⁇ s 2 for the position control loops. This leads to the guide bar or guide roller, which is subject to higher loads, opening in the opening direction, that is to say away from the belt edge, and thus preventing a load on the roller bearings in the first stand of the finishing train.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

In a positioning control device for guiding the side edges of an elongated strip at the entrance into a hot-rolled wide strip finish rolling mill train, guidance feed members are displaced transversely of the rolling direction by piston-cylinder assemblies. Appropriate displacement of the guidance feed members depends on continuously transmitted measured actual values of the strip position within the rolling train which are compared with preset required values. If the width of the strip exceeds a nominal width then large deformation of the strip side edges occurs along with axial reaction forces in the roller supports of the first rolling stand in the finish rolling mill. To avoid damage to the first rolling stand and to the strip, a pressure regulation is superimposed on the position regulation and depending on a comparison of the actual value of the measured upsetting force acting along the strip side edges with a predetermined required value, a correction-setting signal is generated for the displacement of the guidance feed members in the opening or closing direction relative to one another.

Description

Die Erfindung bezieht sich auf eine Positioniersteuereinrichtung für vor dem Eingang von Warmbreitband-Fertigwalzstraßen angeordnete, aus quer zur Walzrichtung verschiebbaren Führungslinealen bzw. Führungsrollen bestehende, von Kolben-Zylinder-Aggregaten angetriebene Bandseitenführungen, die in Abhängigkeit von ständig übermittelten Meßwerten der Bandpositionen innerhalb der Fertigwalzstraße für jeden den Kolben-Zylinder-Aggregaten zugeordneten Positionsregelkreis nach Vergleich der Ist-Meßwerte mit vorgegebenen Soll-Werten Stellsignale erzeugt, die eine entsprechende Verschiebung einer oder beider Führungsleisten bzw. Führungsrollen bewirken.The invention relates to a positioning control device arranged in front of the entrance of hot strip finishing rolling mills, consisting of guide rulers or guide rollers that can be displaced transversely to the rolling direction and driven by piston-cylinder units, strip side guides that are dependent on continuously transmitted measured values of the strip positions within the finishing rolling mill for each position control circuit assigned to the piston-cylinder units, after comparison of the actual measured values with predetermined target values, generates control signals which cause a corresponding displacement of one or both guide strips or guide rollers.

Positioniersteuereinrichtungen dieser Art basieren auf der aufgrund praktischer Versuche gewonnenen Erkenntnis, daß die Bandlage in der Fertigwalzstraße identisch der Form und der Lage des Vorbandes ist, d.h. gerade Vorbänder haben bei richtig eingestellter Fertigwalzstraße einen entsprechend geraden und guten Bandlauf, bei dem die Seitenführungen das Band nur halten, und ein Auffahren der Bandkanten an den Seitenführungen zum Bandverlauf führt. Den entscheidenden Einfluß auf den Lauf des Bandes durch die Fertigwalzstraße hat eine Bandseitenführung, die vor dem ersten Gerüst der Fertigwalzstraße angeordnet ist; mit ihr kann die Lage des Bandes und damit der Bandverlauf in der nachfolgenden Fertigwalzstraße gezielt beeinflußt werden.Positioning control devices of this type are based on the knowledge gained from practical tests that the strip position in the finishing mill is identical to the shape and position of the pre-strip, i.e. straight strips have a correspondingly straight and good strip run when the finishing roller is set correctly, in which the side guides only the strip hold, and opening the belt edges on the side guides leads to the belt run. The decisive influence on the run of the strip through the finishing mill is a strip side guide, which is arranged in front of the first stand of the finishing mill; with it, the position of the tape and thus the course of the tape in the following Finishing mill can be influenced in a targeted manner.

Bei einer bekannten Ausbildung einer Positioniersteuerung dieser Art (DE-OS 3 116 278) werden die Seitenkanten des Warmbreitbandes vor dem Eintritt in das erste Gerüst der Fertigwalzstraße von quer zur.Walzrichtung in Verschiebeführungen bewegbaren Führungsrollen beaufschlagt. Die Verschiebebewegungen werden dabei durch Stellmotoren bewirkt, die Bestandteil von Positionier-Regelkreisen sind. Es ist mit Hilfe dieser Stellmotoren möglich, einem zu erwartenden Schräglauf des Bandes bereits entgegenzuwirken, bevor dieser Verlauf sichtbar wird, da die Vergleichsauswertung der von den innerhalb der Fertigwalzstraße angeordneten Meßeinrichtungen übermittelten Meßergebnisse eine Tendenz des Bandes zum Schräglauf so rechtzeitig ankündigt, daß der entsprechenden Lageveränderung durch Verschieben der Führungsrollen entgegengewirkt werden kann. Die bekannte Einrichtung bedient sich dabei insbesondere elastisch verformbarer Biegebalken, die bei einer geringfügigen elastischen Verformung mittels Dehnungsmeßstreifen bereits Signale auslösen, wenn der Seitendruck der Kanten des Walzbandes vorgegebene Werte überschreitet.In a known configuration of a positioning control of this type (DE-OS 3 116 278), the side edges of the hot wide strip are acted upon by guide rollers which can be moved transversely to the rolling direction in displacement guides before entering the first stand of the finishing mill. The displacement movements are effected by servomotors that are part of positioning control loops. With the help of these servomotors, it is possible to counteract an expected skewing of the strip before this course becomes visible, since the comparative evaluation of the measurement results transmitted by the measuring devices arranged within the finishing mill announces a tendency of the strip to skew so in good time that the corresponding change in position can be counteracted by moving the guide rollers. The known device makes use in particular of elastically deformable bending beams which, in the case of a slight elastic deformation by means of strain gauges, already trigger signals when the side pressure of the edges of the rolled strip exceeds predetermined values.

Diese Positioniersteuerung hat sich für die Seitenführung im wesentlichen normaler Vorbänder bewährt. Schwierigkeiten treten dann auf, wenn z.B. das Ende eines Vorbandes breiter ist als dessen Nennbreite. Das Bandende wird in diesem Fall gewaltsam vom ersten Fertiggerüst durch die Seitenführung gezogen und beansprucht diese Führungen ggfs. mit einem Mehrfachen der Normallast. Es kann dabei zu einer großen einseitigen Deformation der Bandkanten und sogar zu einem Ausknicken des Bandes kommen und außerdem zu großen axialen Reaktionskräften in den Lagern der Walzen der ersten Walzgerüste der Fertigstraße; diese Beanspruchung tritt insb. dann auf, wenn das Bandende einseitig gekrümmt ist. Das Bandende stützt sich in diesem Fall einseitig an einer der Seitenführungen ab und drückt mit verhältnismäßig großer Kraft gegen diese. Die Reaktionskräfte müssen von den Axiallagern der Walzen der ersten Walzgerüste der Fertigstraße aufgenommen werden und können zu Beschädigungen der Lager führen. Die bekannten Positionssteuereinrichtungen reagieren auf einen solchen Zustand nicht, oder falsch, da die angezeigte Lage des Bandes für die Meßeinrichtungen innerhalb der Fertigwalzstraße korrekt ist und die ggfs. vorhandenen Meßeinrichtungen für den Seitendruck lediglich die Überschreitung des vorgegebenen Sollwerstes anzeigen und die Erzeugung von Korrektursignalen für die Wiederherstellung des Geradlaufes des Bandes veranlassen.This positioning control has proven itself for the lateral guidance of essentially normal pre-strips. Difficulties arise when, for example, the end of a supporting strip is wider than its nominal width. In this case, the end of the belt is forcibly pulled from the first finishing stand through the side guide and may stress these guides with a multiple of the normal load. This can result in a large one-sided deformation of the strip edges and even buckling of the strip and also in large axial reaction forces in the bearings of the rolls of the first roll scaffolding of the finishing train; this stress occurs especially when the band end is curved on one side. In this case, the end of the belt is supported on one side on one of the side guides and presses against it with relatively great force. The reaction forces have to be absorbed by the axial bearings of the rollers of the first rolling stands of the finishing train and can damage the bearings. The known position control devices do not respond to such a condition, or do so incorrectly, since the position of the strip displayed for the measuring devices within the finishing mill is correct and the measuring devices for the side pressure, if any, only indicate that the specified target value has been exceeded and the generation of correction signals for the Have the belt restore straight running.

Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäßen Positioniersteuereinrichtungen so zu verbessern, daß die schädlichen Auswirkungen zu breiter Bänder oder gebogener Bandenden auf die Seitenführungen, das Band und die Lager durch die Arbeitsweise der Positioniersteuereinrichtung vermieden werden. Diese Aufgabe wird dadurch gelöst, daß die Positionsregelung von einer Druckregelung überlagert ist, die in Abhängigkeit von dem Vergleich des Ist-Wertes der bei Beuaufschlagung einer Führungsleiste bzw. Führungsrolle durch die Bandkante auftretenden und gemessenen Stauchkraft mit einem vorgegebenen Sollwert ein Korrektur-Stellsignal für die Verschiebung beider Führungsleisten bzw. Führungsrollen im öffnungs- bzw. Schließsinne erzeugt. Überschreitet die Stauchkraft eine bestimmte, von der Bandbreite, der Banddicke und der Formänderungsfestigkeit abhängige Größe, dann veranlaßt das dadurch erzeugte Korrektur-Stellsignal über den Positionsregelkreis eine Verschiebung beider Führungsleisten bzw. Führungsrollen voneinander weg im öffnungssinne bis die Stauchkraft wieder auf den zulässigen vorgegebenen Wert abgesunken ist.The invention has for its object to improve the generic positioning control devices so that the harmful effects of wide tapes or bent tape ends on the side guides, the tape and the bearings are avoided by the operation of the positioning control device. This object is achieved in that the position control is superimposed by a pressure control which, depending on the comparison of the actual value of the compressive force occurring and measured by the strip edge when a guide strip or guide roller is acted upon, with a predetermined desired value, a correction actuating signal for the Displacement of both guide strips or guide rollers in the opening or closing sense generated. If the compressive force exceeds a certain size, which depends on the bandwidth, the strip thickness and the resistance to deformation, the correction actuating signal generated thereby causes the two guide strips or guide rollers to be displaced away from each other in the opening direction until the compressive force drops again to the permissible predetermined value is.

Wie die Erfindung weiter vorsieht, wird die schädlich hohe Lagerbelastung als Folge gekrümmter Bandenden dadurch vermieden, daß ggfs. von einem Uberwachungsregler ein zusätzliches Korrektur-Stellsignal für die Positionsregelung der Führungsleisten bzw. Führungsrollen geliefert wird. Dies ist der Fall, wenn die Differenz-Stauchkraft zwischen Antriebs-und Bedienungsseite, die ständig gemessen wird, einen vorgegebenen Differenz-Sollwert überschreitet. Dann bewirkt dies eine entsprechende Verschiebebewegung der höher belasteten Führungsleiste bzw. Führungsrolle im öffnungssinne, d.h. von der zugeordneten Bandkante weg.As the invention further provides, the damaging high bearing load as a result of curved belt ends is avoided in that an additional correction control signal for the position control of the guide strips or guide rollers is possibly supplied by a monitoring controller. This is the case when the differential compressive force between the drive and operator side, which is measured continuously, exceeds a predetermined differential setpoint. Then this causes a corresponding displacement movement of the guide bar or guide roller which is subject to higher loads in the opening direction, i.e. away from the assigned band edge.

Durch ein gezieltes Verfahren der Seitenführungen im öffnungs-und Schließsinne mit entsprechendem Regelungskonzept läßt sich die Breite des Vorbandes im begrenzten Umfang korrigieren, ohne daß dabei die Bandkanten deformiert werden oder das Band ausknickt.The width of the sliver can be corrected to a limited extent by means of a targeted movement of the side guides in the opening and closing directions with a corresponding control concept, without the strip edges being deformed or the strip buckling.

Die Erfindung wird anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. In der Zeichnung zeigen

  • Fig. 1 die Ansicht einer der beiden Seitenführungen in Walzrichtung gesehen in schematischer Darstellung und
  • Fig. 2 ein Schaltbild des Aufbaues der Positionsregelung. Wie aus Fig. 1 zu ersehen, sind die Führungsrollen 1 in einer quer zur Walzrichtung verschiebbaren Kassette 2 gelagert. Diese Kassette 2 weist an der der Führungsrolle abgewandten Seite eine Anschlagplatte 3 auf, die von der Stirnfläche des Kolbens 4 des Kolben-Zylinder-Aggregates 5 beaufschlagt wird, dessen Zylinder um eine ortsfeste, parallel zur Walzrichtung verlaufende Achse 6 drehbar gelagert ist. Mit Abtsand oberhalb und unterhalb des Kolben-Zylinder-Aggregates sind an die Kassette zwei weitere Balancier-Kolben-Zylinder-Aggregate 7 und 8 mit parallel zur Walzrichtung verlaufenden Achsen 7a, 8a angelenkt und um ebenfalls parallel zur Walzrichtung verlaufende ortsfeste Achsen 7b, 8b schwenkbar. Die Ausbildung des Kolben-Zylinder-Aggregates 5, dessen Kolben 4 die Anschlagplatte 3 beaufschlagt, in Verbindung mit den beiden Balancier-Kolben-Zylinder-Aggregaten 7 und 8 erlaubt es, die Kanten des (nicht dargestellten) Walzbandes mitttels der Führungsrollen 1 mit hohem Druck zur Erzielung einer Stauchwirkung zu beaufschlagen. Die beiden Balencierzylinder 7 und 8 ziehen dabei die Kassette 2 mit der Anschlagplatte 3 praktisch spielfrei gegen die Stirnfläche des Kolbens 4 des Kolben-Zylinder-Aggregates 5.
The invention is explained in more detail with reference to the embodiment shown in the drawing. Show in the drawing
  • Fig. 1 shows the view of one of the two side guides in the rolling direction in a schematic representation and
  • Fig. 2 is a circuit diagram of the structure of the position control. As can be seen from Fig. 1, the guide rollers 1 are mounted in a cassette 2 which can be displaced transversely to the rolling direction. This cassette 2 has, on the side facing away from the guide roller, a stop plate 3 which extends from the forehead Surface of the piston 4 of the piston-cylinder unit 5 is applied, the cylinder of which is rotatably mounted about a stationary axis 6 running parallel to the rolling direction. Abtsand above and below the piston-cylinder unit, two further balancing piston-cylinder units 7 and 8 are articulated to the cassette with axes 7a, 8a running parallel to the rolling direction and can also be pivoted about stationary axes 7b, 8b also running parallel to the rolling direction . The formation of the piston-cylinder unit 5, the piston 4 of which acts on the stop plate 3, in connection with the two balancing piston-cylinder units 7 and 8, allows the edges of the (not shown) rolled strip to be raised by means of the guide rollers 1 with a high Apply pressure to achieve a compression effect. The two Balencier cylinders 7 and 8 pull the cassette 2 with the stop plate 3 practically without play against the end face of the piston 4 of the piston-cylinder unit 5.

Das in Fig. 2 dargestellte Schaltbild der Positioniersteuerung zeigt Anordnung und Verbindung der Schaltungselemente. Zum Verfahren großer Wege dient bei dieser Anordnung ein Niederdruck (ND)-System. Die Kolben-Zylinder-Aggregate 5 auf der Antriebs- und Bedienungsseite werden über Schaltventile 10 mit den ND-Pumpen verbunden. Aus der Pumpenkapazität und den Zylinderabmessungen ergibt sich dabei die mögliche Verfahrgeschwindigkeit. Über das ND-System kann der jeweilige Lehr-Walzspalt grob angefahren werden. Anschließend erfolgt die genaue Positionierung über die Positionsregelung der Kolben-Zylinder-Aggregate 5. Bei einem Ausfall des HD-Systems ziehen die bereits erläuterten Balancier-Zylinder 7,8 (Fig. 1) den Kolben 4 des Kolben-Zylinder-Aggregates 5 automatisch zurück, so daß auch bei einem solchen Ausfall in der Walzenstraße weitergewalzt werden kann.The circuit diagram of the positioning control shown in FIG. 2 shows the arrangement and connection of the circuit elements. In this arrangement, a low-pressure (LP) system is used to travel long distances. The piston-cylinder units 5 on the drive and operating side are connected to the LP pumps via switching valves 10. The possible travel speed results from the pump capacity and the cylinder dimensions. The respective gauge roll gap can be roughly approached using the ND system. The exact positioning is then carried out via the position control of the piston-cylinder units 5. If the HD system fails, the already explained balancing cylinders 7, 8 (FIG. 1) automatically pull the piston 4 of the piston-cylinder unit 5 back , so that rolling can continue even in the event of such a failure.

Kolben- oder Kolbenstangenseite des Kolben-Zylinder-Aggregates 5 werden entsprechend der jeweiligen Bewegungsrichtung über ein Servoventil 11 mit dem Systemdruck beaufschlagt bzw. mit dem Tank 12 verbunden. Die in unmittelbarer Nähe der Servoventile 11 angeordneten Speicher sind so bemessen, daß kleine Verstellwege ohne größeren Druckverlust aus den Speichern gefahren werden können. Die Kapazität der - nicht dargestellten - HD-Pumpe ist deshalb klein.The piston or piston rod side of the piston-cylinder unit 5 are acted upon by the system pressure or connected to the tank 12 via a servo valve 11 in accordance with the respective direction of movement. The accumulators arranged in the immediate vicinity of the servo valves 11 are dimensioned in such a way that small adjustment paths can be driven out of the accumulators without major pressure loss. The capacity of the - not shown - HD pump is therefore small.

Die Kreisverstärkung des Positionsregelkreises mit einem Positionsgeber 13 auf der Antriebs- und der Bedienungsseite setzt sich aus einem elektrischen und einem hydraulischen Anteil zusammen. Wird eine Soll-Ist-Abweichung festgestellt, dann wird über Positions- und Stromregler das Servoventil 11 um eine bestimmten Betrag entsprechend der elektrischen Verstärkung geöffnet. Die sich dann einstellende Verfahrgeschwindigkeit ist aber nicht nur proportional zur Ventilöffnung, sondern hängt zusätzlich auch von dem Druckgefälle an der Steuerkante des Servöverntils 11 ab. DiessDruckgefälle wird von der Stauchkraft und vom Systemdruck bestimmt. Die Kreisverstärkung des Positionsregelkreises ist also kraftabhängig.The loop gain of the position control loop with a position transmitter 13 on the drive and the operator side is composed of an electrical and a hydraulic component. If a target / actual deviation is determined, then the servo valve 11 is opened by a certain amount in accordance with the electrical amplification via position and current controllers. The then moving speed is not only proportional to the valve opening, but also depends on the pressure drop at the control edge of the servo valve 11. This pressure drop is determined by the compression force and the system pressure. The loop gain of the position control loop is therefore dependent on the force.

Zwei Druckgeber 14, 15 messen die Stauchkraft auf Antriebs-und Bedienungsseite. Überschreitet z.B. die gemesssene Kraft den vorgegebenen Sollwert 16, liefert der Druckregler 17 ein Korrektursignal Δs1 für den Positionsregelkreis. Dies bewirkt eine Verschiebung der Führungsleisten bzw. Führungsrollen voneinander weg im öffnungssinne bis die Stauchkraft wieder auf den zulässigen vorgegebenen Wert abgesunken ist.Two pressure transmitters 14, 15 measure the compression force on the drive and operator side. If, for example, the measured force exceeds the predetermined target value 16, the pressure controller 17 supplies a correction signal Δs 1 for the position control loop. This causes the guide strips or guide rollers to move away from each other in the opening direction until the compressive force has dropped again to the permissible predetermined value.

An dem Summierer 18 wird ständig die Differenzstauchkraft zwischen Antriebs- und Bedienungsseite ermittelt. Überschreitet diese Kraft den vorgegebenen Sollwert 19, liefert der Überwachungsregler 20 Korrektursignale Δs2 für die Positionsregelkreise. Dies führt dazu, daß die höher belastete Führungsleiste bzw. Führungsrolle im öffnungssinne, also von der Bandkante weg auffährt und so eine Belastung der Walzenlager in dem ersten Gerüst der Fertigstraße verhindert wird.The differential compressive force between the drive and operating side is continuously determined on the summer 18. If this force exceeds the predetermined target value 19, supplies the monitoring controller 20 correction signals Δs 2 for the position control loops. This leads to the guide bar or guide roller, which is subject to higher loads, opening in the opening direction, that is to say away from the belt edge, and thus preventing a load on the roller bearings in the first stand of the finishing train.

Claims (3)

1. Positioniersteuereinrichtung für vor dem Eingang von Warmbreitband-Fertigwalzstraßen angeordnete, aus quer zur Walzrichtung verschiebbaren Führungslinealen bzw. Führungsrollen bestehende, von Kolben-Zylinder-Aggregaten angetriebene Bandseitenführungen, die in Abhängigkeit von ständig übermittelten Meßwerten der Bandpositionen innerhalb der Fertigwalzstraße für jeden den Kolben-Zylinder-Aggregaten zugeordneten Positionsregelkreis und nach Vergleich der Ist-Meßwerte mit vorgegebenen Soll- Werten Stellsignale erzeugt, die eine entsprechende Verschiebung einer oder beider Führungsleisten bzw. Führungsrollen bewirken,
dadurch gekennzeichnet,
daß die Positionsregelung von einer Druckregelung überlagert ist, die in Abhängigkeit von dem Vergleich des Ist-Wertes der bei Beaufschlagung einer Führungsleiste bzw. Führungsrolle durch die Bandkante auftretenden und gemessenen Stauchkraft mit einem vorgegebenen Sollwert ggfs. einKorrektur-Stellsignal für die Verschiebung beider Führungsleisten bzw. Führungsrollen im öffnungs- bzw. Schließsinne erzeugt.1. Positioning control device for strip runners arranged in front of the entrance of hot-rolled strip finishing rolling mills and consisting of guide rulers or guide rollers that can be displaced transversely to the rolling direction and driven by piston-cylinder units. Position control circuit assigned to cylinder units and after comparison of the actual measured values with predetermined target values, actuating signals are generated which cause a corresponding displacement of one or both guide strips or guide rollers,
characterized,
that the position control is overlaid by a pressure control which, depending on the comparison of the actual value of the compressive force occurring and measured when a guide strip or guide roller is acted upon by the belt edge with a predetermined setpoint value, possibly a correction actuating signal for the displacement of both guide strips or Guide rollers generated in the opening or closing sense. 2. Positioniersteuerung nach Anspruch 1, dadurch gekennzeichnet,
daß aus dem Vergleich der Differenz von an beiden Führungsleisten bzw. Führungsrollen auftretenden Stauchkräften mit einem vorgegebenen Sollwert über einen Überwachungsregler ein Korrektur-Stellsignal gebildet wird, das eine Verschiebung der Führungsleisten bzw. Führungsrollen im öffnungssinne bewirkt.2. Positioning control according to claim 1, characterized in that
that from the comparison of the difference between the upsetting forces occurring on both guide strips or guide rollers with a predetermined target value via an over monitoring controller a correction control signal is formed, which causes a displacement of the guide strips or guide rollers in the opening direction. 3. Positioniersteuerung nach den Ansprüchen 1 und/oder 2 mit einem quer verfahrbaren Schlitten gelagerten Führungsrollen,
dadurch gekennzeichnet,
daß die Führungsrollen (1) mit dem Schlitten (2) zweiseitig gelagert sind und der Schlitten (2) an seiner der Führungsrolle (1) abgewandten Seite eine Anschlagplatte (3) mit vertikal, parallel zur Walzrichtung verlaufender Anschlagfläche aufweist, die von der Stirnfläche des Kolbens (4) des Kolben-Zylinder-Äggregates (5) beaufschlagbar ist, wobei das Zylindergehäuse des Kolben-Zylinder-Aggregates (5) um eine ortsfeste parallel zur Walzrichtung liegende Achse (6) schwenkbar ist, und daß an dem Schlitten (2) ober- und unterhalb der Anschlagplatte (3) Balancier-Kolben-Zylinder-Aggregate (7, 8) auf parallel zur Walzrichtung liegenden Achsen (7a, 8a) angelenkt sind und die Zylindergehäuse um ortsfeste, ebenfalls parallel zur Walzrichtung liegende Achsen (7b, 8b) schwenkbar sind.3. Positioning control according to claims 1 and / or 2 with a transversely movable carriage mounted guide rollers,
characterized,
that the guide rollers (1) with the carriage (2) are mounted on two sides and the carriage (2) on its side facing away from the guide roller (1) has a stop plate (3) with a vertical, parallel to the rolling direction stop surface, which is from the end face of the Piston (4) of the piston-cylinder unit (5) can be acted upon, the cylinder housing of the piston-cylinder unit (5) being pivotable about a stationary axis (6) lying parallel to the rolling direction, and that on the carriage (2) Above and below the stop plate (3) balancing piston-cylinder units (7, 8) are articulated on axes (7a, 8a) lying parallel to the rolling direction and the cylinder housings around fixed axes (7b, 8b also lying parallel to the rolling direction) ) are pivotable.
EP85106802A 1984-06-27 1985-06-03 Position control device for sideguides or guide rollers that are arranged shiftable at right angles to the direction of rolling before hot strip finishing rolling mills Expired EP0166981B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85106802T ATE35387T1 (en) 1984-06-27 1985-06-03 POSITIONING CONTROL DEVICE FOR IN FRONT OF THE ENTRANCE OF HOT WIDE STRIP FINISH ROLLING MILLS ARRANGED, TRANSVERSE TO THE ROLLING DIRECTION SLIDING GUIDES OR. GUIDE ROLLERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843423560 DE3423560A1 (en) 1984-06-27 1984-06-27 POSITIONING CONTROL DEVICE FOR BEFORE THE INPUT OF WARM BROADBAND FINISHING ROLLING MILLS, CROSS-SLIDING GUIDE LINEAL OR. LEADERSHIP ROLES
DE3423560 1984-06-27

Publications (2)

Publication Number Publication Date
EP0166981A1 true EP0166981A1 (en) 1986-01-08
EP0166981B1 EP0166981B1 (en) 1988-06-29

Family

ID=6239197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106802A Expired EP0166981B1 (en) 1984-06-27 1985-06-03 Position control device for sideguides or guide rollers that are arranged shiftable at right angles to the direction of rolling before hot strip finishing rolling mills

Country Status (5)

Country Link
US (1) US4590778A (en)
EP (1) EP0166981B1 (en)
JP (1) JPS6114013A (en)
AT (1) ATE35387T1 (en)
DE (2) DE3423560A1 (en)

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DE19613728B4 (en) * 1996-01-25 2004-03-25 Sms Demag Ag Process for rolling stainless steel strip
WO2007104604A1 (en) 2006-03-15 2007-09-20 Siemens Aktiengesellschaft Method for the operation of a rolling mill used for milling a strip-shaped rolling stock
CN102489520A (en) * 2011-12-06 2012-06-13 中国重型机械研究院有限公司 Three-roller stable roller mechanism

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GB2276108B (en) * 1990-10-23 1995-05-03 Ishikawajima Harima Heavy Ind Method of guiding a strip of material
JPH0669582B2 (en) * 1990-10-23 1994-09-07 石川島播磨重工業株式会社 Side guide control method
DE19713604A1 (en) * 1997-04-02 1998-10-08 Schloemann Siemag Ag A position-controlled compression frame arranged upstream of a finishing train for continuously cast strip material
IT1296906B1 (en) * 1997-12-24 1999-08-02 Abb Sistemi Ind Spa DEVICE FOR ADJUSTING THE TAPE INPUT GUIDES IN A ROLLING MILL
RU2254947C2 (en) * 2003-05-05 2005-06-27 Открытое акционерное общество "Колпинский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения" Rolling mill manipulator
DE102008026946B4 (en) * 2007-08-29 2017-05-04 Sms Group Gmbh Apparatus and method for positioning a band edge mask in a plating plant
GB2468913B (en) * 2009-03-27 2011-02-16 Siemens Vai Metals Tech Ltd Fully hydraulic edger for plate mills
DE102009041453A1 (en) 2009-09-12 2011-03-24 Sms Siemag Ag Guiding device for a strip rolling mill
DE102009060826A1 (en) * 2009-12-29 2011-06-30 SMS Siemag AG, 40237 Regulation of the lateral guidance of a metal strip
DE102009060823A1 (en) * 2009-12-29 2011-06-30 SMS Siemag AG, 40237 Regulation of lateral guides of a metal strip
CN102189123B (en) * 2011-03-04 2013-02-27 安徽马钢和菱实业有限公司 Pneumatic accurate positioning control device for axle rolling
ITMI20120840A1 (en) * 2012-05-15 2013-11-16 Danieli Off Mecc CONTROL SYSTEM FOR HYDRAULIC MILLS OF MILL FOR ASTIFORM BODIES
CN104785548A (en) * 2014-01-16 2015-07-22 宝山钢铁股份有限公司 Strip steel edge guide device
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DE19613728B4 (en) * 1996-01-25 2004-03-25 Sms Demag Ag Process for rolling stainless steel strip
WO2007104604A1 (en) 2006-03-15 2007-09-20 Siemens Aktiengesellschaft Method for the operation of a rolling mill used for milling a strip-shaped rolling stock
CN101400456B (en) * 2006-03-15 2011-10-05 西门子公司 Method of operating a rolling mill for rolling strip-shaped rolling stock
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CN102489520A (en) * 2011-12-06 2012-06-13 中国重型机械研究院有限公司 Three-roller stable roller mechanism
CN102489520B (en) * 2011-12-06 2014-04-23 中国重型机械研究院有限公司 Three-roller stable roller mechanism

Also Published As

Publication number Publication date
JPS6114013A (en) 1986-01-22
EP0166981B1 (en) 1988-06-29
DE3423560A1 (en) 1986-01-09
ATE35387T1 (en) 1988-07-15
US4590778A (en) 1986-05-27
DE3563516D1 (en) 1988-08-04

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